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∏(1-\(1\over P\))=\(e^{-γ}\over{ln(x)}\)推出\({ln(x)}e^γ\)=∏\(P\over{P-1}\), 所以∏\(({P\over{P-1}})^n\)=\(({ln}(x)e^γ)^n\)=\({ln}^n(x)e^{nγ}\),而最密五生素数的系数为:∏\({P^4(P-5)}\over(P-1)^5\),当P≥7时,为此形式,对于素数2,\({2^4(2-1)}\over(2-1)^5\)=\({1\over 2}{2^5\over(2-1)^5}\),同样素数3,\({3^4(3-2)}\over(3-1)^5\)=\({1\over 3}{3^5\over(3-1)^5}\),同样素数5,\({5^4(5-4)}\over(5-1)^5\)=\({1\over 5}{5^5\over(5-1)^5}\),当素数P≥7后,\({P^4(P-5)}\over(P-1)^5\)=\({P^5\over(P-1)^5}{{P-5}\over P}\)=\(({P\over{P-1}})^5{(1-{5\over P})}\),把素数2,3,5的放进去:\(1\over {30}\)∏\(({P\over{P-1}})^5{(1-{5\over P_i})}\),\(P_i\)≥7. P≥2. |
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